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Lenz turbine | 13 comments (13 topical)
Re: Lenz turbine (3.00 / 0) (#8)
by zap on Sat May 21, 2005 at 12:50:03 AM MST

Hey Mike I like the design but I have a Q for you and Ed about the coanda effect

I don't know much about the effect except what I read years ago when Hughes was testing the notar.  From what I know about it... won't the lift that it creates just want to pull your center column to the outside?  I can see how it would create a low pressure and I assume that low would be reacting 90° to the wind direction?  If I have that correct, how does this impart a rotative force?  Or is the low used to "pull" air between the airfoil and column?  Thanks,

zap



Re: Lenz turbine (3.00 / 0) (#10)
by rotornuts on Sat May 21, 2005 at 10:40:21 AM MST

I'm thinking/hoping it will pull air between the airfoil and the column effectively increasing how many degrees of rotation the unit will produce power and reducing drag and downwind turbulence but as Ed has pointed out It's questionable how much benefit it may have as the wind shadow from the upwind blade occurs at almost the same time as you want the effect. I'm building a model right now so I can get a better visualization.

http://www.absoluteastronomy.com/encyclopedia/C/Co/Coanda_effect.htm

I'm thinking keeping the two blade confiquration but reducing the cord width in proportion to the center.

[ Parent ]



Re: Lenz turbine (3.00 / 0) (#11)
by windstuffnow on Sat May 21, 2005 at 11:53:57 AM MST

  Sounds Fun!  I'm looking forward to seeing and reading about your outcome with it!  

So much fun... so little time...

Windstuff Ed

Have Fun! Windstuff Ed
[ Parent ]



Lenz turbine | 13 comments (13 topical)

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